Release PyOZ v0.3.1 · pyozig/PyOZ

What's New in v0.3.1

Cross-platform CI testing for example module - Tests on Linux, Windows, and macOS
- New example-module job in CI workflow testing 3 platforms × 4 Python versions (3.10-3.13)
- Comprehensive test coverage: basic functions, classes, magic methods, __base__ inheritance, iterator views, dict/set views, datetime types, error handling, custom exceptions, NumPy buffers, and submodules
- Added examples/** to CI trigger paths
- Added format checking for examples/ directory

macOS Python 3.13 crash during interpreter shutdown - Fixed use-after-free in submodule creation
- createSubmodule was allocating PyModuleDef on the stack, but Python stores a reference to it
- When the function returned, the stack memory became invalid
- During Python's GC traversal at shutdown, accessing the freed memory caused a crash
- Fix: Use a comptime-generated static struct to hold the PyModuleDef
Windows support - PyOZ now works correctly on Windows
- Replaced python3-config with sysconfig module for cross-platform Python detection
- Fixed library naming (python313 on Windows vs python3.13 on Unix)
- Fixed example module extension (.pyd on Windows vs .so on Unix)
- Fixed crash when inheriting from Python built-in types (__base__)
  - On Windows, DLL data imports (like PyList_Type) require runtime address resolution
  - Comptime initialization used import thunk address instead of actual type object
  - Added runtime initBase() for Windows while preserving comptime on Linux/macOS

Python detection now uses sysconfig module (standard library since Python 3.2) on all platforms
python3-config is no longer required on any platform

Download the binary for your platform and add it to your PATH:

Download PyOZ-0.3.1.tar.gz for the source code.

pyoz init mymodule
cd mymodule
pyoz build
pip install dist/*.whl